Pandora's Box is a great myth which deals with the question "Why is there evil in the world?"

In Greek mythology, Pandora was the first woman on Earth. Zeus ordered Hephaestus, the god of craftsmanship, to create her and he did, using water and earth. The gods endowed her with many talents; Aphrodite gave her beauty, Apollo music, Hermes persuasion, and so forth. Hence her name: Pandora, "all-gifted".

Pandora had a jar which she was not to open under any circumstance. Impelled by her natural curiosity, Pandora opened the jar, and all evil contained escaped and spread over the earth. She hastened to close the lid, but the whole contents of the jar had escaped, except for one thing which lay at the bottom, and that was Hope.

There is no reason to think Pandora acted out of malice in opening the jar, for she was exercising her curiosity, and when she saw what was let out of it, she quickly closed it.

Moral of the story: no matter how many terrible things happen on Earth there is always hope.

Another point to take from this story: it is human nature to do things we shouldn't. Pandora was told not to open the box but because of her natural human curiosity she opened it. Presumably she wanted to know what was so special/important/dangerous that it had to be kept secret and locked away. She wanted to be 'in on the secret'.